Standard stellar mass

A Standard Stellar Mass (ssm) was a comparative unit of measurement, used to measure the masses of large astronomical objects, especially stars. The value of this measurement represented the average mass of a G-type yellow star, the most common type of star around which life (and therefore civilization) developed.

One ssm was equivalent to 33,000 standard planetary masses (spm) or 2,000,000,000,000,000,000,000,000,000 (2x10^27, two octillion) tonnes.